I remember that duck!
While I never actually played the Earthbound games myself, I remember that duck being used in this "Hock" animation here by Billy Cass! I had no idea what was going on, and why the other characters were ghosts. What really saved this was the great animation. All of the characters, especially the ghosts and the duck were designed well. I thought it was funny how that dumb duck just made quacking sounds when it was defeated. It was a bit hard to find much point in this, but most NG flashes are like that anyway.